Collapsible enclosure



FIG. 1 is a front perspective view of a collapsible enclosure showing mynew design with a door flap in a closed position;

FIG. 2 is a front perspective view thereof with the door flap in an openposition;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side side elevational view thereof; and,

FIG. 6 is a top view thereof.

The broken lines showing additional detail are for illustrative purposesonly and form no part of the claimed design.

CLAIM The ornamental design for a collapsible enclosure, as shown anddescribed.